Question
Use the normal distribution to find a confidence interval for a difference in proportions p1-p2 given...
Use the normal distribution to find a confidence interval for a difference in proportions p1-p2 given the relevant sample results. Assume the results come from random samples.
A 90% confidence interval for p1-p2 given thatp^1=0.25 with
n1=40 and p^2=0.35 with n2=120
Give the best estimate for p1-p2, the margin of error, and the
confidence interval.
Round your answer for the best estimate to two decimal places and
round your answers for the margin of error and the confidence
interval to three decimal places.
Best estimate : Enter your answer; Best estimate
Margin of error : Enter your answer; Margin of error
Confidence interval : Enter your answer; Confidence interval, value
1to Enter your answer; Confidence interval, value 2
Homework Answers
Answer #1
Given
The best estimate for (p1 - p2) is =
Margin of error E
A 90% confidence interval for (p1 - p2) is
(ans)
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